Rabbit, we can all mark buyers payment with paid, they can see that - it's like a receipt if you like - but f/back is something else,

it's not a receipt for the payment.

In our case (all sellers are different I guess) it's much more important how these people behave towards any of us, it's an old saying if you deal with people in a "store" situation,

you'll not remember what they bought, how much they paid for it - but you'll remember for a very long time if they were nice.

Same as service provided by sellers: Buyers will also not remember what they bought, how much did it cost them, not even when they bought it - by they will remember the service.

It works both ways, but f/back is definitelly not a receipt for payment.

I know exactly what you mean though, as it is now (the f/back) is not perfect - and maybe it never will be as too many variables are left to individual opinions more than the facts, same as with DSR's.

Cheers, January